Improvement in burglar and fire alarms



v BURGLAB. AND FIRE-ALARMS. No. 183,562. Patented OCLM, 1876.

c H1 AB DEFGAAJKL Wihz asses: Iz 716732217@ A UNITED .'Sfrntrnsj NATHAN HARPER, OF NEWARK, NEW JERSEY, ASSIGNOR T0 LLEWELLYN ,i F. HASKELL.

IMPROVEMENT IN BURGLAR AND FIRE ALARMS.

Specification forming part of Letters Patent No. 183,562, dated October 24, 1876 application led April 25, 1874.

To all whom it may concern:

Be it known that I, NATHAN HARPER, of the city of Newark, in the county 4of .Essex and State of New Jersey, have invented' cer- I tain new and useful Improvements in Burglar and Fire Alarms, of which the following is a specification My invention relates to improvements upon the apparatus for which Letters Patent No. 25,586, of September 27, 1859, and N o. 120,399, of October 31,1871, weregranted to A. Q. Ross, and consists, first, in an improved device for lighting a match; secondly, in an improved method of connecting the gas-cock with the piston which drives the match, and of causing the piston to move as required; thirdly, of an improved form of. trigger for releasing the match-striking apparatus and of its combined action with the pawl setting and unsetting the alarm; and, fourthly, in a peculiar device for connecting the blinds or shutters with the alarm.

Figure 1 is a perspective view of' the matchstriker, trigger a, and cam-pawl L. Fig. 2 represents the samein different positions. Figs. 3 and 4 are sectional views of the matchstriker; Fig. 5, an end view of thenipple T;

Fig. 6, a perspective view of the blind andV shutter fastening Figs. '7 and 8, views of the same, showing ahorizontal section through the handle c.

The trigger a is pivoted to the hinged frame Z, to rotate on its pivot from right to left, in a line parallel with the hinged frame. The trigger is so made that when the cam-pawl L does not touch the lower end of the trigger the weight of the latter causes it to rotate till its upper end is placed under the cross-head Q, as shown in Fig. 2. The cam-pawl L is made broad at its free end to act upon the lower end of the trigger a in such a way that when the alarm is unset by engaging the campawl L in the wheel G the cam-pawl bears against the lower end of the trigger a and prevents the upper end of the trigger from acting on the cross-head Q, when the hinged frame Z and the trigger a are raised and lowered by the opening of doors and windows, as is shown in Fig. 1. When the machine is set by turning the cam-pawl out of the wheel G,

the frame Z being in its lowest position, the trigger rotates on its pivot, and its upper end passes under the cross-head Q; and when the frame Z and the trigger a. are raised in the sounding lof the alarm the trigger pushes up and disengages the cross-head Q from the stop R, as shown in Fig. 2. The cross-heads Q and Q1 and the side-'rods W are rigidly 'secured to one another, and form a frame. The

vtube S passes freely through the cross-head Q, that the frame Q Q1 W may move freely horizontally, sliding on the tube S. A pistonrod, U, is fixed in the. cross-head Q1, and eX- tends through the tube S to the open slotor groove S1, when the cross-head Q rests against the stop R, as shown in Fig 3. The tube S is provided at one end with a-rigid nipple,'T. This nipple has four points, tt t t, formed inside of its smaller end by cutting .two grooves at right angles to each other and through the thickness of the end of the' nipple, as shown in the end view, Fig. 5. These .points are near enough to each other to apply friction to the head ofl a match and ignite it when the piston U drives the match through the nipple, as shown in Fig. 4. The lever P is secured to the key of the gas-faucet O, so that when the lever rotates it opens and closes the faucet. The chain P is secured to the crosshead Q, and to the upper end of the lever P. The spring P is secured to the'lower end of the lever P, and to a suitable point under the shelf of the machine, in such a manner as to pull the lever and rotate it when the crosshead Q is liberated from the stop R, as shown by the dotted lines in Fig. 2.

The action of these parts is as follows: To set the machine, the frame Q Q W is pulled to the left and the cross-head Q passed over the stop R andv allowed to rest against it, as shown in Fig. 1. This closes the gas-faucet. A match is placed in the groove S', with its head in the nipple T. The cam-pawl L is turned back out of the wheel G till it does not touch the lower end of the trigger a. The doors and windows being closed, and the frame Z being in its lowest position, the finger M engages the wheel Gr, and the upper end of the trigger is under the cross-head Q. If a window or door be now opened, the frame Z raises the finger M from the wheel G,`that the gong may be rung; the trigger a frees the cross-head Q from the stop R, when the spring P" rotates the lever P, which lever opens the gas-faucet and by the cha-in pulls the frame Q Q, W toward the right, and the piston U drives the match through the nippleT, and thus ignites the match, which in its turnlights the gas, or a candle or lamp.

Fig. 6 represents in perspective the blind and shutter fastening. The plate B islet into .the top of the window-sill directly under the lower sash, and supports the lever H in lugs cast upon its lower side. The leven H is an ordinary oscillating` lever, pivoted at itszcen.- ter. The end shown in the drawing is depressed when the sash is down by a pin projecting downward from the sashA for that purpose.` The other end of the leverrises by this action and tightens the wire attached to it and running to the alarm. To allow the window-sashes to be left wide openfor-ventilation, the lever H may be depressed by the lug a on the arm or hasp A, connected with the `shutters or blinds.' TheI lug a. is provided with an inclined surface a. which is `caused rod or bolt E to bear against4 the iron plateD,

which is let intothe'onter andverticaldsideof the window-sill. The bolt E is mounted in bearingsl in the plate G, and is free tobe turned partly around by the handle e4. The lower end e of the bolt is.` aneccentric. When the handle e isturned as in Fig. 7, the eccentric e is `flush with the plate C but when the handle is turned as in Fig. 8, the eccentric forces the plate C away from the plate D,.

planea to press against the plateBandhold theA lug a in its place. When the blind is forced open in any way the pressure ofthe eccentric e is removed, and the lug a is thrown out of its place in;u the. platej B. n `H Qhelever H then comes up, and the wire running to. the alarm is thereby Slackeued and` the alarm rings. i

l clamherenesfnew and 0f myinventiou-f 1. the` improved` Gam-nml; Iain` Combination with the improved trigger a, hinged frame Z., crossfhead. Qantl; serieel, lever P, and Spring P, the partebeiugtonneedaud Operating; Substantially in.@1.1mmarmer` and fQr the. burros@ Set forth 2.- The eccentric E. and the-hasn A.. incombination` with berwinden-plate B. the parts being Connected and. Operating. substantially in the manner andifor thepilrpose Set forth.

In. testimony of which` invention I hereunto Setmy hand this 24th. day of April, A D- 1874- NATHAN HARPER- Witnesses:

JoaNiP. BROOKS, Y UZAL A. YOUNG. 

